"Welfare economics is the economics of attitude."
Kenneth Arrow's quote, "Welfare economics is the economics of attitude," implies that the field of welfare economics, which studies the distribution and efficiency of wealth and well-being in an economy, is not solely about numbers and quantitative analysis but also about the attitudes, values, and perspectives people hold towards wealth and welfare. In essence, Arrow emphasizes that economic policies and decisions should not only consider the objective state of an economy but also the subjective attitudes and priorities of its inhabitants to achieve a truly optimal and equitable distribution of resources.
"The existence of sustainable equilibrium requires that people have similar degrees of risk aversion."
Kenneth Arrow's statement suggests that for an economic system to be stable (reach a "sustainable equilibrium"), individuals within it should have similar attitudes towards risk. In other words, if everyone is highly risk-averse, they are likely to avoid taking risks, which could hinder economic growth. Conversely, if everyone is extremely risk tolerant, excessive risk-taking might lead to instability. For a stable and balanced economy, it's ideal for most people to have moderate levels of risk aversion, as this allows for controlled risk-taking that drives progress while maintaining stability.
"The more alternatives there are to choose among, the less likely it is that there will be an agreement on any given alternative."
Kenneth Arrow's quote emphasizes the paradoxical nature of decision-making in complex environments with numerous options. When faced with multiple choices, the likelihood of finding a consensus or agreement decreases due to individual preferences and values that may differ significantly among people. This is particularly relevant in democratic societies where many decisions require collective agreement, yet the sheer number of possible solutions can lead to disagreement and stalemate. It underscores the importance of effective communication, understanding, and compromise when dealing with a broad range of alternatives.
"Average costs may decrease as the scale of output increases, but marginal cost always increases."
Kenneth Arrow's statement suggests that while the average cost of producing a good can decline as the scale of production increases (due to economies of scale), the additional cost of producing one more unit or "marginal cost" will always increase. This is because as production quantity increases, it may become easier and cheaper to spread fixed costs over a larger number of units, but adding more resources or capacity to keep up with increased demand will inevitably lead to higher per-unit costs.
"Democracy is a device for achieving an approximation of justice in a society large enough to make direct human relationships impossible."
Kenneth Arrow's quote emphasizes that democracy serves as a mechanism to strive for fairness and justice in societies that are too vast for individuals to interact directly. The ideal of "direct human relationships" refers to situations where every citizen knows each other, like small communities or families. In larger societies, this is impossible; therefore, democracy provides a structure for decision-making, aiming to ensure the voice of each individual is heard and their interests considered in a fair manner, ultimately promoting justice.
The major driver of economics is the equilibrium approach, which has taken various forms over the years. General equilibrium is the statement that all the different parts of the economy influence each other, even if it's remote, like mortgage-backed securities and their demands on automobiles.
- Kenneth Arrow
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